Monitor Disk I/O in Bps on Ubuntu

[moshikoy]

Hi All!
I would like to monitor Disk(partition) I/O rate in Bytes/sec (not ops) so I can create a graph
I saw that linux 2.4+ doesn't support it by default

it can be achieved using a calculated field.
using these parameters:
UserParameter=custom.vfs.dev.read.sectors[*],awk '{print $$3}' /sys/class/block/$1/stat
UserParameter=custom.vfs.dev.write.sectors[*],awk '{print $$7}' /sys/class/block/$1/stat

How should I parse a calculated field that will take in considiration the delta and a sector size of 512B?

Thanks
Mosh

[moshikoy]

the main issue here is working with times between the alerts

can someone provide an example?

[kaspars.mednis]

You can try to use delta (speed per second)
It's basicall delta of two values divided by seconds between those values

If you want to do some more manipulations with source data, you can use custom multiplier

More info here (look at preprocessing)

https://www.zabbix.com/documentation/3.4/manual/config/items/item

https://www.zabbix.com/documentation/3.4/manual/appendix/items/preprocessing

Regards,
Kaspars